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Monitoring method, monitoring device and monitoring system for wind-solar micro-grid by applying grid-connected technology

A micro-grid and wind-solar technology, applied in circuit devices, photovoltaic power generation, AC network circuits, etc., can solve the problems of large grid shock, slow response, slow action, etc., to optimize work performance and ensure voltage stability.

Inactive Publication Date: 2020-08-18
XIANGTAN UNIV
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

However, due to the intermittent nature of the micro-grid power generation of new energy sources such as wind power and photovoltaic power generation, it will have a certain impact on the large power grid when connected to the grid. Therefore, energy storage systems are often used in micro-grids to ensure smooth progress during grid connection. The use of energy storage systems in micro-grids has slow response and sluggish actions, which reduces energy utilization and even impacts large power grids, increasing power safety risks

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  • Monitoring method, monitoring device and monitoring system for wind-solar micro-grid by applying grid-connected technology
  • Monitoring method, monitoring device and monitoring system for wind-solar micro-grid by applying grid-connected technology
  • Monitoring method, monitoring device and monitoring system for wind-solar micro-grid by applying grid-connected technology

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[0042] In order to make the purpose, technical solution and advantages of the present application clearer, the technical solution of the present invention will be described in detail below in conjunction with the drawings and embodiments. Apparently, the described embodiments are only some of the embodiments of this application, not all of them. Based on the embodiments in the present application, all other implementation manners obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present application.

[0043] In one embodiment, such as figure 1 As shown, the present invention provides a monitoring method for a wind-solar microgrid using grid-connected technology, including the following steps:

[0044] Monitor the output demand of wind-solar microgrid;

[0045] Adjust the charging and discharging mode and power of the energy storage system according to the output demand.

[0046] The embodiment of the present in...

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Abstract

The invention discloses a monitoring method, a monitoring device and a monitoring system for a wind-solar micro-grid by applying a grid-connected technology, belongs to the field of micro-grids of power systems, and can predict the generated power of power generation equipment in the micro-grid and the change of a load borne by the power generation equipment. According to the method, the method comprises the steps of: tracking large power grid grid-connected point voltage information; acquiring a large power grid dispatching instruction in real time; detecting the capacity of the energy storage system in real time; setting the discharge interval of the energy storage system; based on an SOC hierarchical control strategy, optimally managing energy of the energy storage system, correcting charging and discharging power of the energy storage system in real time, optimizing working performance of the energy storage system, formulating and implementing an optimal control strategy, so that it is guaranteed that the microgrid participates in large power grid voltage adjustment according to requirements of a large power grid during grid connection, and voltage stability during grid-connected operation is guaranteed.

Description

technical field [0001] The present invention relates to the field of power system micro-grids, in particular, to a monitoring method, monitoring device and system for a wind-solar micro-grid using grid-connected technology. Background technique [0002] With the continuous progress of society, traditional energy power generation and human activities have brought proven damage to the social environment, while energy consumption continues to increase, resulting in a decrease in traditional energy. At this stage, the form of new energy microgrid grid-connected power generation is gradually being promoted. However, due to the intermittent nature of the micro-grid power generation of new energy sources such as wind power and photovoltaic power generation, it will have a certain impact on the large power grid when connected to the grid. Therefore, energy storage systems are often used in micro-grids to ensure smooth progress during grid connection. The use of energy storage syste...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/28H02J3/38H02J3/46
CPCH02J3/28H02J3/381H02J3/466H02J2300/24H02J2300/28H02J2300/40Y02E10/56Y02E70/30
Inventor 冷爱莲申晗秋周志刚杨澄张飞李育龙闫世钊廖佳
Owner XIANGTAN UNIV
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